Common boiler tube acceptance standards and techniques

Appearance inspection
Appearance inspection is the first step in tube acceptance. Inspections should be carried out in accordance with regulations, mainly including the following points:
1. The surface of the tube should be clean and free of oil stains, and the cuts and cuts should be cut neatly without defects such as damage, cracks, bubbles, corrosion, etc.
2. The two ends of the tube should be in a parallel state.
3. The inspection surface should not have bulges, depressions, missing clamps, metal knurling, etc.
4. The surface of the tube should have a bright color, and cold-drawn tubes should generally have no skin cracks, orange peels, punctures, etc.
Dimension inspection
Dimensions are the focus of attention when accepting tubes. It is necessary to master the dimensional standards of various parts and pay attention to the following points:
1. The dimensions of the tube wall thickness, diameter, length, roundness, etc. must meet the relevant standards.
2. Each tube must be marked with necessary information such as specifications, materials, batch numbers, and production dates.
3. Test according to the prescribed test methods to ensure that the test data is accurate and reliable.
Material inspection
The quality of steel pipes is not only related to the service life of steel pipes, but also to the safety performance and later maintenance of boilers. Because the quality of steel pipes is closely related to materials, material inspection is required. Pay attention to the following points:
1. The pipes must meet relevant standards and requirements, and the surface quality must meet standard requirements.
2. The pipe certificate must not be missing, especially the pressure level of the steel pipe must meet the requirements to ensure its safe use.
3. The pipe material is consistent with the boiler material, and there must not be too many impurities such as slag inclusions and burrs.
Nondestructive testing
Nondestructive testing is a scientific testing method for the quality of steel pipes. Nondestructive testing can detect defects and quality problems inside the material to ensure that the quality of the steel pipe meets the requirements. Common nondestructive testing methods include ultrasonic, eddy current, and radiation.
Safety precautions
When accepting pipes, you must pay attention to safety to prevent accidents, especially when performing nondestructive testing. The following are some common safety precautions:
1. Operators need to have relevant professional knowledge and experience and strictly abide by relevant operating procedures and processes.
2. Operators must be familiar with the use of various pipe acceptance equipment, understand the principles and methods of use of the equipment, and ensure the normal operation of the equipment.
3. The workplace must be kept clean and safe, and deep clean to avoid accidents caused by messy tools and objects.
4. Operators must wear relevant protective equipment in accordance with regulations to ensure their own safety.
In short, when conducting boiler pipe acceptance, it is necessary to follow the corresponding acceptance standards and specifications to ensure the quality and safety of steel pipes.